This is my first model in blender, I hope you enjoy, you may use this for whatever you want.
I will probably update this one so it has a ramrod, and maybe even a bayonet. Thanks for stopping by! (EDIT: I don't think I can update it, but I will post another blend of the same musket, this time with a ramrod.)
Late reply, but it is - and was - very much possible to to edit models.